Greer, who was a key campaigner in the 2014 vote which saw Scots reject independence by a 10 per cent margin, said: "We are working on a timescale now where Article 50 (which triggers Britain leaving the European Union) will be activated next month – that's the timescale when it will almost certainly become clear whether there's going to be a referendum or not.

Scotland’s last independence referendum was less than three years ago, with a majority of 55.3 per cent voting to remain part of the UK.

More than 3.6m people turned out to vote in the Scottish independent referendum, resulting in a 'No' vote with 55.3%.Here we take a look at the public's reaction.

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Pro-Union supporters celebrate as Scottish referendum polling results are announced at the Royal Highland Centre in Edinburgh, Scotland, on September 19, 2014

First Minister Nicola Sturgeon suffered yet another Brexit blow after MPs overwhelmingly voted down an SNP amendment calling for the triggering of Article 50 to be delayed until at least a month after the devolved nations agree to a UK-wide approach for Britain’s EU exit.

The SNP-led clause was defeated by 332 votes to 62 – a majority of 270.

PA

The news comes as Theresa May's Brexit bill looks set to sail through the Commons without amendments

In yet more bad news for Sturgeon and the SNP, the Scottish Government, the Welsh Assembly and the Northern Irish Assembly will not be given an additional month to debate Theresa May’s Brexit plan before Article 50 is triggered.

Sturgeon has been very clear about her desire to keep Scotland in the single market and if the UK Government opts for a hard Brexit it could lead the way for another independence vote.